function bookmark(){
if(document.all)window.external.AddFavorite(location.href,document.title);//ff

else if(window.sidebar)window.sidebar.addPanel(document.title,location.href,'');//ie

else if(window.chrome)// chrome
	alert("After you click Ok, please press 'Ctrl D' to bookmark this page!");
else
        alert("After you click Ok, please press 'Ctrl D' to bookmark this page!");
}